op {
  name: "StringFormat"
  input_arg {
    name: "inputs"
    type_list_attr: "T"
  }
  output_arg {
    name: "output"
    type: DT_STRING
  }
  attr {
    name: "T"
    type: "list(type)"
    has_minimum: true
  }
  attr {
    name: "template"
    type: "string"
    default_value {
      s: "%s"
    }
  }
  attr {
    name: "placeholder"
    type: "string"
    default_value {
      s: "%s"
    }
  }
  attr {
    name: "summarize"
    type: "int"
    default_value {
      i: 3
    }
  }
}
